Endogeneity in network formation hinders the identification of the role social networks play in generating spillovers …, peer effects and other externalities. This paper tackles this problem and investigates how the link network between … exploits local exogenous shocks on a small number of nodes in the network. It can thus avoid the usually required, but strong …

We develop a model of R&D competition between an incumbent and a potential entrant with network externalities and … problem and the efficiency of its R&D level are determined by the extent of the network externalities. …

This paper analyzes the impact of network externalities on R&D competition between an incumbent and a potential entrant …. The analysis shows that the incumbent always invests more than the entrant in the development of higher quality network … the presence of network externalities. By choosing compatible network goods, firms do not necessarily reduce the R …

This paper studies the incentives to undertake uncertain R&D initiatives in a dynamic duopoly network industry. It is … shown that network externalities positively affect the incentives to invest in R&D. In the model, competition resembles a …. Moreover, network externalities have an important impact in the dynamic evolution of the industry. Although in the long-run a …

I quantify spillovers of attention in a network of content pages, which is challenging, because such networks form … endogenously. I exploit exogenous variation in the article network of German Wikipedia to circumvent this problem. Wikipedia … how the link network causally influences users' search and contribution behavior. I use a difference …

causal effects is challenging. We identify causal WOM effects in the empirical setting of game adoption in a social network …